Machine for the application of glue to a running band and the cutting of the band at the place of the glue application

ABSTRACT

A glue application and cutting means for a running band is disclosed, the running band being used for the wrapping of large rolls of paper. The running band is brought in contact with a glue applying roller by means of a pressure roller pivotably mounted at a distance ahead of the glue applying roller in a swinging frame. A cutting knife is mounted on the frame between the pressure roller and the glue applying roller, whereas a striking beam is mounted in a second swinging frame on the other side of the band relative to the cutting knife. By its strike movement the striking beam will hit the running band in the area between the cutting knife and the pressure roller, thereby cutting the band avoiding glue application on the trailing edge area of the running band.

Uite @KEEQS Eatent 1 Brovoll m1 3,723,986 51 Aprf24, 1973 MACHINE FOR THE APPLTCATTON OF [75] Inventor: Oskar Brovoll, Oslo, Norway [73] Assignee: Thune-Eureka A/S, Oslo, Norway [22] Filed: June 25,1971

[21] Appl. No.: 156,901

1,993,488 3/1935 Schmidt et a1. ..1 18/41 UX Primary Examiner.1ohn P. McIntosh Att0rneyYoung & Thompson [5 7 ABSTRACT A glue application and cutting means for a running band is disclosed, the running band being used for the wrapping of large rolls of paper. The running band is brought in contact with a glue applying roller by means of a pressure roller pivotably mounted at a distance ahead of the glue applying roller in a swinging frame. A cutting knife is mounted on the frame between the pressure roller and the glue applying roller, whereas a striking beam is mounted in a second swinging frame on the other side of the band relative to the cutting knife. By its strike movement the striking beam will hit the running band in the area between the cutting knife and the pressure roller, thereby cutting the band avoiding glue application on the trailing edge area of the running band.

2 Claims, 3 Drawing Figures PAIENTEUAPR 241975 SHEET 1 OF 3 MACHINE FOR THE APPLICATION OF GLUE TO A RUNNING BAND AND THE CUTTING OF THE BAND AT THE PLACE OF THE GLUE APPLICATION The invention concerns a device relating to a machine for the application of glue to a running band and the cutting of the band at the place of the glue application, where the running band is brought in contact with a glue applying roller by means of a pressure roller.

The invention is developed in connection with a machine for the wrapping of large rolls of paper, where the wrapping paper is first laid on in three or four layers, then glue is applied in a further laying on of two or more layers. Subsequently the wrapping paper is folded in towards the ends of the roll of paper.

In such roll wrapping machines, the wrapping paper must first be able to be delivered freely to the roll which is to be wrapped or enveloped, subsequently, glue must be able to be applied to the wrapping paper, and finally, cut, following which new wrapping paper must be delivered freely for the wrapping of the next roll of paper.

The purpose of the invention is to provide such a device relating to a machine for the application of glue to a running band and the cutting of the band at the place of glue applicatiomwhere the running band is brought in contact with a glue applying roller by means of a pressure roller, the running band may be delivered freely when needed, and delivered in contact with the glue applying roller when needed, the band may be cut at the place of glue application when desired.

A special purpose of the invention is to facilitate such a cutting of the band that glue is not applied to the last part of the wrapping paper. This is desirable in order to avoid that glue should be pressed out of the end lap by the laying on of the wrapping paper around the roll of paper.

Pressed out glue could cause the rolls to stick together during subsequent handling and transport, with the nuisances caused by this.

Even if the invention has been especially developed in connection with a roll wrapping machine as mentioned above, the invention is, of course, not limited to this area of utilization.

According to the invention the pressure roller is pivotably mounted at a distance ahead of the glue applying roller in a first swinging frame, which by means of a power unit may be moved in the direction towards or away from the glue applying roller. Further, a cutting knife is mounted on the swinging frame between the pressure roller and the glue applying roller, and a strike beam is mounted in a second swinging frame which by means of a power unit may be moved in the directions towards and away from the running band, whereby the strike beam is arranged on the other side of the band relative to the cutting knife, and such that it, by the strike movement effectuated by its power unit, will hit the running band in the area between the cutting knife and the pressure roller, thus cutting the band. i

In that the pressure roller is mounted in a swinging frame, it may be moved in the directions towards and away from the glue applying roller, such that the space between the pressure roller and the glue applying roller, according to need, may be opened for the running band, such that the running band may pass freely between said two rollers and thus not have glue applied. When the swinging frame is moved in the direction towards the glue applying roller, the pressure roller will contact the running band and move it to glue applYing contact with the glue applying roller.

The cutting knife is, as stated, mounted on the swinging frame and will follow the movement of the pressure roller. The cutting knife is arranged between the pressure roller and the glue applying roller, and by the cutting by means of the strike beam, which hits the running band on the side which is away from the cutting knife and between the cutting knife and the pressure roller, the last part of the running band will be released from or lifted from the glue applying roller, so that glue will not be applied to the last part of the running band.

According to the invention, the cutting knife may suitably be adjustable in the direction of the band. In this way, one may, by moving the knife in the direction towards or away from the first contact line of the running band with the glue applying roller, regulate the length of that section of the running band to which glue is not to be applied by the cutting.

After the cutting, the swinging frame of the strike beam will be retracted by the power unit, such that the running band again may be freely delivered between the pressure roller and the glue applying roller for the wrapping or enveloping of a new roll.

The invention will be further explained under reference to the drawings which show a device according to the invention.

The device shown in FIGS. 1 3 are intended for a roll wrapping machine for the wrapping of large rolls of paper, and only the details of construction necessary for the understanding of the invention are shown.

FIG. 1 shows a device according to the invention, with-the paper band being delivered freely.

FIG. 2 shows the device in FIG. 1, with the paper band being delivered such that glue is applied to one side.

FIG. 3 shows the device when cutting the band.

A roll of paper 20 is to be wrapped or enveloped by a paper band 2 which comes from a storage roll (not shown), and which is delivered by means of two feed rollers l8, 19. The paper band 2 passes a deflection roller and is led by guiding devices (not shown) down to the roll of paper 20. The roll of paper 20 is rotated in the direction of the arrow, and first, say, three or four layers of the paper band 2 are wound on. Following this, say two or threelayers, glued together would be wound on, necessitating the application of glue to one side of the paper band 2.

For the application of glue, a glue applying roller is provided. Glue is supplied to the roller in a way not shown, in that this is not significant in relation to the invention. As an example, a glue supplying roller being submerged in a tray may be utilized, which delivers glue to the applying roller 1 by means of an intermediate roller.

In-order to bring the paper band 2 in contact with the glue applying roller 1, a pressure roller 9 is provided.

This pressure roller 9 is pivotably mounted in two brackets 8 which in turn are secured to a unit 7. The

unit 7 is secured to two swinging arms which are pivotably mounted in a machine frame (not shown) by means of a shaft 4. On the drawings, only one bracket 8 and one swinging arm 5, are shown, but it iS implied that a corresponding bracket and arm are pivoted in the other end of the pressure roller 9 and shaft 4, respectively, such that a swinging frame is formed, the long direction of which being perpendicular to the plane of the paper. On the unit 7 and accordingly on the swinging arms 5 are mounted brackets 10, respectively, which are mutually connected by means of a knife beam 11. The knife beam 11 supports a knife 12. By means ,of an adjusting screw 13 the knife beamll may be moved in the long direction of the paper band 2, such that the distance between the knife 12 and the contact line between the paper band and the glue applying roller 1 may be regulated.

When the swinging frame, formed by the swinging arms 5, is moved towards the right in FIG. 1, the pressure roller 9 will be brOught to bear against the paper band 2, and will move this to glue application contact with the glue application roller as is shown in FIG. 2. Subsequent to the necessary number of glued layers being wound onto the roll 20, it is necessary to cut the paper band 2.

Parallel to the shaft 4 it is in the machine frame, which as stated is not shown, mounted a shaft 14. This shaft 14 is connected to two swinging arms 15, of which only one is shown, corresponding to the case of the swinging arms 5, and at their ends the swinging arms 15 are interconnected by means of a strike beam 16. The swinging arm 15 is connected to a power cylinder 17.

When the necessary number of glued layers of the paper band 2 are wound onto the roll 20, the band 2 is cut by that the power cylinder 17 is supplied with a compressed media, causing the swinging frame, formed by the swinging arms 15, with the strike beam 16 to move towards the left in the Figures, as is evident from FIG. 3., The paper band 2 will be cut against the knife 12. The last part of the paper band 2 will then not be subjected to glue application, in that the paper band 2 will lift itself from the glue applying roller 1. in this way, the spilling of glue is avoided in the last smoothing over of the end lap of the roll 20.

Subsequent to the cutting, the swinging frame with the strike beam 16 is retracted by meanS of the power cylinder 17, and likewise the swinging frame formed by the swinging arms 5 is moved towards the left by means of the power cylinder, indicated by means of the piston rod 6 which performs as the power unit for the pressure roller 9. By this, the two swinging frames are brought to the positions which are indicated in FIG. 1, and the feed rollers 18 and 19 may again freely deliver the new paper band 2, which at the bottom near the new roll 20 are guided by guidance devices (not shown), such that it comes in contact with the roll 20 and that the winding on of the paper band 2 on the new paper roll may start.

Having described my invention, I claim:

1. Improvement in a machine for the application of glue to a running band and the cutting of the band at the place of glue application, where the running band is brought in contact with a glue applying roller by means of a pressure roller, characterized in that the pressure roller (9) i8 pivotably mounted at a distance ahead of th lue a l in roller (1 in a first swin in frame 5 hi h by iiiezi ns ofa first p ower unit (6) r na be moiie in the directions towards and away from the glue applying roller, in that a cutting knife (12) is mounted on the swinging frame (5) between the pressure roller (9) and the glue applying roller (1), and that a striking beam (16) is mounted in a second swinging frame (15) which by means of a second power unit (17) may be moved in the directions towards and away from the running band (2), in that the strike beam is arranged on the other side of the band relative to the cutting knife, and such that it, in the strike movement effectuated by its power unit (17), will hit the running band in the area between the cutting knife and the pressure roller, thereby cutting the band.

2. Device according to claim 1, characterized in that the cutting knife (12) is mounted adjustably in the direction of the band. 

1. Improvement in a machine for the application of glue to a running band and the cutting of the band at the place of glue application, where the running band is brought in contact with a glue applying roller by means of a pressure roller, characterized in that the pressure roller (9) iS pivotably mounted at a distance ahead of the glue applying roller (1) in a first swinging frame (5) which by means of a first power unit (6) may be moved in the directions towards and away from the glue applying roller, in that a cutting knife (12) is mounted on the swinging frame (5) between the pressure roller (9) and the glue applying roller (1), and that a striking beam (16) is mounted in a second swinging frame (15) which by means of a second power unit (17) may be moved in the directions towards and away from the running band (2), in that the strike beam is arranged on the other side of the band relative to the cutting knife, and such that it, in the strike movement effectuated by its power unit (17), will hit the running band in the area between the cutting knife and the pressure roller, thereby cutting the band.
 2. Device according to claim 1, characterized in that the cutting knife (12) is mounted adjustably in the direction of the band. 